Celestia and Tyler have been married for a long time. They had not foreseen an uprising by the Queen of Changelings and her ruthless army. Nearly out of resources for battle, the two become desperate and reach out to as many royal guards as possible to help defend Canterlot.

One of the most highly decorated guards must be sent over to Canterlot, far away from his current home. He needs to leave his family behind, and with no guarantee of his return.